An efficient ultrasonic-assisted synthesis of imidazolium and pyridinium salts based on the Zincke reaction
作者:Sanhu Zhao、Xiaoming Xu、Lu Zheng、Hai Liu
DOI:10.1016/j.ultsonch.2009.12.019
日期:2010.4
irradiation for the synthesis of imidazolium and pyridinium salts based on the Zinckereaction. Tertiary nitrogen nucleophiles such as pyridines and imidazoles can be alkylated with primary amine by simply using their ammonium form Zincke salts. In almost all cases, a clear yield increase results and a dramatic reduction of the reaction time accompanied by an improved quality of the products occurs.